Follow the restoration instructions making sure to use the option to create an admin account.
Login to that new account and go to “Users”/”Add New” and fill in the form to create a new administrator. Ensure that the Role is changed to “Administrator” and that TOS and “Activate this User” are both selected and click the blue “Add New User” button. Now logout (top right of window) and login as the new administrator. If this was succesful you can go to “Users”/”All Users” and delete the temp admin. You will note that there is an account fisher which will allow Steve Fisher <firstname.lastname@example.org> to login if invited to do so. You may also delete this account if you so wish – but it will make it harder for Steve to help you if you have subsequent problems.
Next click on “Remove Installation Files now”